recent article on World Stamp News.
The article mentions that a confectioner was assigned to the imperial court as early as the mid-16th century. According to Mark Pendergrast's Uncommon Grounds, however, the first coffee shops opened in the 17th Century; the discrepancy might just be an error with the nomenclature (17th Century = 1600s).
In any case, coffee and confections have a long history together, and the Austrian post office is celebrating the original Schweden-Bomben (which sounds a lot like bon-bon to me) with a new stamp. My thanks, as always, to Henry Lukas of the Spellman Museum for this scrumptious tidbit of coffee history!